The suspect, who also died, has been named as 28-year-old former Marine Ian David Long, Ventura County Sheriff Geoff Dean said in a news conference early Thursday morning.

Thousand Oaks is located 40 miles northwest of Los Angeles in the foothills of the Santa Monica Mountains close to Malibu, where many members of the entertainment industry live. It is a quiet, residential community where violent crime is rare, according to CNN.

“We are on a hamster wheel of insanity. Another day of grief. Another day of outrage,” Gad said in a tweet. “Another day of families unnecessarily learning their loved ones are dead. But, don’t worry, I remember from all of the other times we’ve done this… ‘guns aren’t the problem.'”

Several of the celebrities are calling for greater gun control and using the hashtag #GunControlNow in addition to Thursday’s trending topics “Thousand Oaks,” #BorderlineShooting and #MassShooting.

Jared Goff, quarterback for the Los Angeles Rams, whose training facility is located in Thousand Oaks, also tweeted his condolences to the victims.

“Heartbroken for the community. Thinking about everyone involved as well as friends and family of the victims,” Goff said in a tweet. “Keep them in your thoughts and prayers.”

The team also released a statement offering their sympathy for the victims.

“The Los Angeles Rams organization is heartbroken by the horrific shooting that took place last night in our community of Thousand Oaks. Our thoughts and prayers are with the victims, their families and our entire community,” it said.

The Los Angeles Kings held a moment of silence for the victims ahead of their game against the Minnesota Wild Thursday night, tweeting: “in the goal to amplify the message that acts of this nature cannot be accepted in our world. #ENOUGH.”

Tonight, the LA Kings and Minnesota Wild share in the goal to amplify the message that acts of this nature cannot be accepted in our world. #ENOUGHpic.twitter.com/XDErFFA8Ct

We are on a hamster wheel of insanity. Another day of grief. Another day of outrage. Another day of families unnecessarily learning their loved ones are dead. But, don’t worry, I remember from all of the other times we’ve done this…”guns aren’t the problem.” https://t.co/dVyvQg9Bac

That’s 12 people that don’t get to live their lives anymore! That have families that have to suffer loss everyday now because of some mentally unstable person with a handgun. THERE HAVE BEEN 307 MASS SHOOTINGS IN 2018 ALONE! NO FUCKING MORE !! #GunControlNow

So sad about the tragedy in Thousand Oaks. So many of my friends & I have frequented that bar . We live in a world where devastation like this can happen anywhere/anytime. I’m so sorry to the victims & everyone involved. And I’m so sorry pain like this occurs ????

My heart aches to learn about the horrific shooting in Thousand Oaks on college night. Praying for the injured and the families of those killed who, like so many others, have lost their loved ones to gun violence. Leaders in Congress must act — not some day, but now.

This man’s struggle with his guilt about surviving the shooting in #ThousandOaks hurts to see. Most of the victims were so young, their whole lives ahead of them. My heart goes out to all their families, as well as the family and friends of the officer killed in the line of duty. https://t.co/13aYYYK3q6

5 Times Parkland Shooting Survivors Were Falsely Criticized (Photos)

As the high school students of Marjory Stoneman Douglas in Parkland, Florida, have increasingly pushed for change around gun control -- most recently in the March for Our Lives events around the country -- they've become the victims of attacks and conspiracy theories by those who wish to discredit them and their cause. Some of the most vocal figureheads of the movement, David Hogg, 17, and Emma Gonzalez, 18, have largely been the targets of these critiques. These five claims have been debunked as false, but it hasn't stopped them from widely circulating on social media.

David Hogg is NOT a "crisis actor"

On Feb. 21, a video claiming that David Hogg was a "crisis actor" briefly became the No. 1 Trending video on YouTube. The video included an old clip of Hogg being interviewed by a Los Angeles CBS affiliate, and it was falsely used as evidence that Hogg did not attend Stoneman Douglas as a student but was an actor. YouTube pulled the video later that day, but not before it received over 200,000 views. A separate meme also claimed that Hogg had attended and graduated from a high school in southern California. And other right-wing writers even claimed that Hogg's media appearances were suspect because his father previously worked for the FBI. Hogg explicitly denied these conspiracy theories.

YouTube

David Hogg WAS on campus at the time of the shooting

An article by Sara Rumpf in RedState questioned whether Hogg was on campus during the shooting. Rumpf noted that Hogg's comments in a CBS documentary and his quotes from a Vox article contradicted each other and called into question whether he was actually on campus. Hogg was on campus during the shooting and then returned several hours later with a camera to interview students. Rumpf later recanted the original report and apologized, but conservative media host Erick Erickson had latched onto the original story and stood by his criticism calling Hogg "a bully."

YouTube

Emma Gonzalez did NOT tear up a copy of the Constitution

An animated GIF went viral showing Emma Gonzalez tearing up a copy of the U.S. Constitution. But the image, which was tweeted out by the Twitter feed "Gab" and later by actor Adam Baldwin, was doctored. The original image came from a video from a Teen Vogue photoshoot in which Gonzalez tears up a firing range target.

Teen Vogue Twitter

Emma Gonzalez did NOT "bully" the Parkland shooter

Two conservative blogs, LouderwithCrowder.com and The American Spectator, posted an abbreviated clip of Emma Gonzalez's remarks at a rally on Feb. 17, claiming that they were "a startling admission" that Gonzalez and others had bullied shooter Nikolas Cruz. "Those talking about how we should have not ostracized him? You didn’t know this kid! OK? We did," Gonzalez said. But in context, Gonzalez was referring to the fact that school officials were alerted to Cruz's behavior and mental instability. Another student, Isabelle Robinson, wrote a New York Times op-ed responding to the idea that students needed to be nicer to Cruz. "The idea that we are to blame, even implicitly, for the murders of our friends and teachers is a slap in the face to all Stoneman Douglas victims and survivors."

CNN

David Hogg did NOT give the Nazi salute

Following his speech at the March for Our Lives rally, an image circulated juxtaposing David Hogg with his arm and fist outstretched with an image of Hitler giving the Nazi salute. "All in favor of gun control, raise your right arm," the meme reads. Several on social media also drew the comparison, but video shows that Hogg extended his closed fist into the air rather than an open palm facing downward.

Getty Images

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Students David Hogg and Emma Gonzalez have been the subject of conspiracy theories, misinformation and doctored images

As the high school students of Marjory Stoneman Douglas in Parkland, Florida, have increasingly pushed for change around gun control -- most recently in the March for Our Lives events around the country -- they've become the victims of attacks and conspiracy theories by those who wish to discredit them and their cause. Some of the most vocal figureheads of the movement, David Hogg, 17, and Emma Gonzalez, 18, have largely been the targets of these critiques. These five claims have been debunked as false, but it hasn't stopped them from widely circulating on social media.